Vectors are quantities with both magnitude and direction, used to represent forces and motion. Equilibrium occurs when the sum of forces and moments acting on an object is zero, leading to a state of balance in physics.
Physics Class 11 Chapter 2 Notes
- The torque acting on a body determines its: angular acceleration
- When the line of action of the applied force passes through the pivot point, the value of moment arm will be: zero
- If the body is rotating with uniform angular velocity then torque acting on body is: zero
- The SI unit of torque is: N m
- A body cannot rotate about its center of gravity under the action of its weight because: moment arm is zero
- The perpendicular distance from the axis of rotation to the line of action of force is called: moment arm
- Conventionally, clockwise torque is taken as: negative
- Turning effect of force is called: moment of force, torque
- The scalar product of two vectors is maximum when they are: Parallel
- The resultant of two forces 3N and 4N making an angle 0o with each other is: 7N
- For the two perpendicular vectors, cross product has value: maximum
- Which property does not hold for vector product: commutative property
- At what angle the dot product will be half of its magnitude: 60o
- At which angle the scalar product could be negative: 180o
- Self cross product of a unit vector is equal to: null vector
- Which of the following is a scalar product: both work and power
- Cross-product of two parallel vectors is: zero
- Self dot product of a vector A is equal to: A²
- If the dot product is negative, then angle between the vectors is: 180°
- Vector A is making angle θ with y-axis its rectangular components have magnitude: Ax = A sinθ, Ay =A cosθ
- Force is equal to product of mass and acceleration, the product is called: simple product
- Three vectors of equal magnitude are added and magnitude of their resultant is zero. The angle between any of two vectors is: 120o
- Two forces act together on an object the magnitude of their resultant force is minimum when angle between them is: 180o
- Which Product of two vectors is commutative: scalar
- At which angle between two vectors, their scalar product is equal to half of the product of their magnitude: 60o
- Vector product of two vectors A and B is defined as: AB sin θ n
- If magnitudes of scalar product and vector product are same; then the angle between the two vectors is: 45°
- When a force of 100 N makes an angle of 600 with y-axis, its y-component is: 50N
- If Rx is positive and Ry is negative, then the resultant lies in: fourth quadrant
- The resultant of two forces 3N and 4N making an angle 90o with each other is: 5N
- Two forces of magnitude 10N each. Their resultant is equal to 20N. Then angle between them is: 0°
- An angle of 30° with x-axis. The magnitude of x-component will be: 8.66
- If Ax and Ay both are negative, the resultant vector will lie in: Third quadrant
- Rectangular components have angle between them is:90°
- If both components of a resultant vector are negative, then resultant lies in: 3rd quadrant
- The magnitude of rectangular components are equal if its angle with x-axis is: 45o
- If Rx and Ry both are negative then resultant lies in the quadrant: 3rd
- If a force of 10N is acting along x-axis then its component along y-axis is: zero
- If rectangular components of a vector has opposite signs, then vector lies in quadrant: either in 2nd or in 4th
- The vector having magnitude one is called: unit vector
- The position vector is a vector that describes: location of a point
- The minimum number of coplanar forces of equal magnitude whose vector sum can be zero, are: 2
- The sum of a vector with its negative vector results into: null vector
- The reverse process of addition of vectors is called: resolution of a vector
- A vector which has the same effect as all the original vectors taken together is called: resultant vector
- The vector subtraction is similar to vector: addition
- Name the quantity which is a vector: Force
- The direction of vector in space is specified by: 3 – Angles
- Maximum number of components of a vector may be: infinite
- If the resultant of two vectors each of magnitude ‘F’ is also of magnitude ‘F’ then the angle between them will be: 30°
- A scalar is a physical quantity which is completely specified by: A number with proper units
- Another name of rectangular co-ordinate system is: Cartesian co-ordinate system
- A unit vector is obtained by dividing the vector with: Its magnitude
- Number of angles required to represent the direction of vector in space are: three
- The vector of zero magnitude and arbitrary direction is called: null vector
- The maximum number of components of a resultant vector are: two
- The minimum number of components of a resultant vector are: 3
- By using head to tail rule we can: both add and subtract the vectors
- Parallel vectors must have same: both magnitude and direction
- Which process is not possible for two vectors: division
- When a number is multiplied with a vector, only its direction is reversed if the number is: –1
- The resultant of two forces of magnitude 5N each, has also magnitude of 5N, the angle between the forces is: 120o
- The vector which describe the location of a point w.r.t the origin is called: position vector
Important : Review all previous years’ 11 Class Past Papers for comprehensive practice and better exam preparation.